F55/F56 :: Hatch Talk (2014+) MINI Cooper and Cooper S (F55/F56) hatchback discussions.

F55/F56 Replace rear sway bar bushings?

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Old Mar 8, 2025 | 10:54 AM
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Replace rear sway bar bushings?

Looking for help, please - everything on video sites seems to be for Gen1 and Gen2, which use a different clamp style and placement. I need to replace the rear sway bar bushings on my 2017 Cooper S 4-door. I'm guessing the clamp has a bolt on each side? I can see the E12 bolt toward the rear of the car, but I'm trying to determine what I need to do to access the one I assume is on the other side of the clamp. I'd appreciate any advice, photos, or videos.


 
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Old Mar 8, 2025 | 11:01 AM
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Found another post - looks like you have to drop the frame? Is that right?
 
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Old Mar 9, 2025 | 08:35 AM
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Yes, you have to lower the rear subframe to gain access to the rear bolts. NM has excellent instructions on their site. It's really an easy job, just cumbersome.
 
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Old Mar 10, 2025 | 03:50 AM
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Originally Posted by ghstrdr
Yes, you have to lower the rear subframe to gain access to the rear bolts. NM has excellent instructions on their site. It's really an easy job, just cumbersome.
Thank you. Took a look at their page, and though it's a bigger job than I was hoping for, it does look manageable.
 
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Old Mar 10, 2025 | 12:19 PM
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Here is a thread about it:

https://www.northamericanmotoring.co...y-bar-diy.html

 
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Old Mar 20, 2025 | 07:21 PM
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Got the job done today - glad I had a friend to help out. The bushings had melted/bonded to the anti-sway bar and had to be cut off. Replaced them with PowerFlex, properly lubricated, along with nm engineering links. Everything seems to move much better, and the back end seems more planted than before.
 
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Old Mar 21, 2025 | 12:32 PM
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Originally Posted by TC69
Got the job done today - glad I had a friend to help out. The bushings had melted/bonded to the anti-sway bar and had to be cut off. Replaced them with PowerFlex, properly lubricated, along with nm engineering links. Everything seems to move much better, and the back end seems more planted than before.
The bushings are part of the bar's torsion resistance, they are bonded to the bar.
Your bar is now less effective.
 
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Old Mar 21, 2025 | 01:14 PM
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Originally Posted by TVPostSound
The bushings are part of the bar's torsion resistance, they are bonded to the bar.
Your bar is now less effective.
I get what you're saying, and that would explain how stuck they were, but....
None of the aftermarket bars have bonded bushings, and PowerFlex is adamant that their bushings must be lubricated. Bonding would restrict movement, seemingly in a negative way.
 
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Old Mar 21, 2025 | 01:17 PM
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Originally Posted by TC69
I get what you're saying, and that would explain how stuck they were, but....
None of the aftermarket bars have bonded bushings, and PowerFlex is adamant that their bushings must be lubricated. Bonding would restrict movement, seemingly in a negative way.
OEM bushings are rubber and have a fixed elastomer rating.
Powerflex are polyurethane, too hard to flex.

 
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Old Mar 21, 2025 | 01:23 PM
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So since I replaced them with PowerFlex, no harm, no foul?
 
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Old Mar 21, 2025 | 01:35 PM
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Originally Posted by TC69
So since I replaced them with PowerFlex, no harm, no foul?
Youre fine, if you feel the bar is now not enough, you do like all the MINI owners, get a bigger one!!!
If you feel the need, then these guys have the perfect gateway drug, uh I mean sway bar!!
23mm rear, that was my first!!
https://www.vipcustomparts.com/suspension%20parts.htm

Im now running H&R 27mm front and 25mm rear with H&R springs.
Dont let anyone tell you a front bar causes understeer, It doesnt in these cars.
 
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